The new pest fall armyworm in corn fields is more serious, how to effectively control it?

In the process of chatting with many corn growers, I found that there are three aspects that everyone is more concerned about: first, how to distinguish fall armyworm? Second, why is fall armyworm so difficult to control? Third, what agent should be used for fall armyworm?

In this article, the little helper will combine these 3 questions and give you a detailed explanation. 1. How to distinguish fall armyworm?

Many friends will think of corn armyworm, corn borer as fall armyworm, this must be wrong, distinguish fall armyworm, in fact, it is very simple, the little helper will say a little, easy for you to remember, observe the head and tail, the head has a "Y" shape, the tail has 4 points, as shown in the figure below, if you still can't remember, then remember like this, the head is "eighty thousand", the tail is "four cylinders", such an explanation, I believe everyone can remember.

2. Why is fall armyworm difficult to control?

There are many reasons why fall armyworm is difficult to control, there are its own factors, there are external factors and internal factors, first of all, its reproductive ability is strong, and the growth rate is fast, an adult can lay hundreds of eggs in a lifetime, such fission is very terrifying; Secondly, it migrates quickly, likes to eat overtly, unlike some pests, it takes a long time to harm a corn, and the fall armyworm eats the whole corn very quickly, and after eating, it harms the next plant, plus it migrates quickly, it is too late to prevent and control, and it has entered the next area; Third, fall armyworm has only begun to enter China this year, and some control technologies have not yet fully matured.

3. What pesticides are used to control fall armyworm?

For fall armyworm, the agricultural departments in many regions have issued guidance on comprehensive prevention and control technology, and the little helper has also seen the notice of the Henan region, from the perspective of pesticides alone, there are more than 20 kinds, and the commonly used single agent is: emamectin benzoate, chlorantraniliprole, Bacillus thuringiensis, chlorfenapyr, indoxacarb, cyhalothrin, deltamethrin, lice cardia, deltamethrin, etc. If the local occurrence is more severe, a combination of the above agents can be used.

Regarding the identification and control of fall armyworm in corn fields, the little helper said so much, hoping to bring some help to growers.

The method of pesticide seed dressing can also effectively control the harm of fall armyworm, which not only has a good control effect, but also has a long effective period, which greatly reduces the cost of pesticides and labor input.

<>1. Pharmaceutical control: when the eggs have just hatched into ants, 10% cypermethrin emulsifiable concentrate 1200-1600 times solution can be used for uniform foliar spraying, and 10% imidacloprid wettable powder 4000 times solution foliar spray should be used. 2. Adult insect control

Trap with insecticidal lamps in the infested area of adult worms.

1. Control methods of fall armyworm in corn meadow

1. Pharmaceutical prevention and control.

1) At the stage when fall armyworm eggs have just hatched into ant insects, 10% cypermethrin EC 1200-1600 times solution can be used to spray evenly on the foliar surface.

2) You can also use a 1200-1600 times solution of 5% cypermethrin EC to spray evenly on the stems and leaves of the plant.

3) Foliar spray can be used with 10% imidacloprid wettable powder 4000 times solution, or 90% crystalline trichlorfon 1000-2000 times solution can be evenly sprayed on the foliar surface.

4) It should be noted that pollution-free pesticides with low toxicity and high efficiency, low residue amount and short residue time should be preferred.

2. Adult insect control

In the occurrence period of fall armyworm adults, insecticidal lamps are used to trap and kill in the affected area, and the control effect can be improved by combining attractants such as food attractants.

2. Harmful symptoms of fall armyworm in corn meadow

1. After the corn leaves are harmed by fall armyworm, there will be translucent film holes and long holes, which are irregularly shaped, which can eat the whole corn leaves, and will cause corn death when the damage is serious.

2. The larvae of fall armyworm will parasitize on crop plants and feed on the leaves and stems of crops, especially the harm to corn is very serious, usually 1 fall armyworm larvae can destroy 1 corn seedling.

3. Fall armyworm is a pest that feeds on crops, mainly harming corn, rice, wheat, barley, sorghum, sugarcane and other crops, and will also harm apples, grapes, oranges, papayas, peaches, strawberries and other fruits, and its food is very large, especially in its advanced age has a certain explosiveness, after eating up a crop area, it will migrate to other crop areas in groups to continue to be harmful, seriously affecting the growth of crops.

Be sure to spray pesticides in time, and also grasp the time of spraying, try to choose the time just hatched for spraying, so that the effect will be better.

This is mainly due to the fact that in these seasons of high incidence of pests and diseases, it is necessary to spray some pesticides in advance to prevent them, so as to ensure the excellent yield of corn.

Pesticides can be sprayed, which can get rid of some pests, and it is necessary to fertilize it so that it grows tall and grows well.

Be sure to spray pesticides in time, and also properly ventilate, do not plant too densely.